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Microprocessor Control Brings About Better Fuel Economy with Good Drivability
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English
Abstract
A microcomputer control system for managing the automotive engine’s air-fuel ratio, spark ignition timing, exhaust gas recirculation and idle speed has been developed and is marketed in Japan under the name of ECCS.
By installing this system in a 1,500 kg vehicle’s 6 cylinder 2.8 liter engine, the four factors listed above have been controlled so precisely that their optimum relative calibration has been realized.
As a result, fuel economy has been improved by 10% while good drivability has been maintained.
This paper outlines ECCS and describes how control factors in a “steady state” are determined. It also discusses the control sequence in transient conditions, such as “cold” starts, “hot” restarts, clutch engagement, acceleration, deceleration, gearshifts and the “warm-up” process.
Authors
Citation
Ikeura, K., Hosaka, A., and Yano, T., "Microprocessor Control Brings About Better Fuel Economy with Good Drivability," SAE Technical Paper 800056, 1980, https://doi.org/10.4271/800056.Also In
References
- Evernham Thomas W. Gvetersloh Donald G. “MISAR - The Microprocessor Controlled Ignition System.” SAE Paper 780666
- Wolber William G. “A World Wide Overview of Automotive Engine Control Sensor Technology.” SAE Paper 780207
- Long David K. “Managing Automotive Microprocessor Interface.” SAE Paper 780121
- Ailer, J. E. Zbroyek J. D. Blumberg, P. N. “Optimization of Automotive Engine Calibration for Better Fuel Economy - Method and Applications.” SAE Paper 770076
- Baker R. E. Daby, E. E. “Engine Mapping Methodology.” SAE Paper 770077